VMCsi & TCsi - Axis Tuning Using Auto Servo Tuning (AST)

Set Manufacture Password.

TRAKmt2021

Archive the current system before making any changes.

Archive Current System

Release [E-Stop] to enable drives.

Jog all the axis to a safe tuning position. The center of travel is ideal.

Navigate to [Setup] → [Optim/test].

To clear the previous tuning history, select [Options] → [Clear History] → [Yes].

Set the "HMI Options with AST" as follows: check the first 8 boxes.

Press [OK] → [OK] to confirm.

Select desired axis, then [Tune].

From the menu, select "Strategy 105. Measure and Retune Speed ctrl," then press [OK].

The position of the axes relative to the active soft limits is displayed. Ensure everything is positioned in a safe location, as the Z axis will move up to 6" in both positive and negative directions during testing.

Once the safe position is set, select [OK].

Select AX6:MSP1 from the axis selections on the left.

Select [Tune Spindle].

From the drop down menu Select [Milling Spindle]

If this is the first time running Auto Tune on the spindle:

Check the first available checkbox: “Position Mode will be necessary to use SPOs, M19, and Tapping.” At the bottom of the page the Axis should read 102. Measure and retune speed and pos ctrl.

If this is not the first time:

Deselect the checkbox mentioned above. At the bottom of the screen the Axis should read 105. Measure and retune speed ctrl

Press [Next Step] → [Tune] → [OK]

The following Message will appear. Press [Cycle Start]

Note: When [Cycle start] is actuated, the measurement process begins. The motor moves at a slow constant feedrate and the frequency response is measured. The measurement process can be stopped via the reset key on the MCP or the E-Stop.

There are 4 total automated tuning cycles. Each tuning cycle will require hitting a [Cycle Start] to initiate.

Prelim Speed ctrl. mech. plant. high freq.

Speed ctrl. mech. plant high freq.

Prelim Speed ctrl. mech. plant low freq.

Speed ctrl. mech plant. low freq.

Each tuning cycle will run for approximately 30 seconds, testing travel with different resonant frequencies.

After the 4 steps are completed, the controller review screen appears.

[Accept] to complete the re-tune process.

The following message appears which can be ignored because no changes are made to the position controller.

Click [OK]→[OK] to continue

Re-Tune process is complete. Test axis movement to confirm the problem is resolved.

If the Autotune fails, proceed with this step to reduce the speed controller gain.

Set Manufacture Password.

Navigate to [Setup] → [Mach Data] → [Drive Parameter] → Press [Select a Drive] to choose the desired drive for the Auto Tune procedure.

[Search] → 1460 → [OK]

Set Parameter 1460 to 70% of its current value.

Cancel Search → [Save/Reset] → [Save] → [Current DO]

After making adjustments, restart the tuning process from Step 5.

Put the machine in E-Stop

Make a final archive to back up the changed data

Archive Current System

Upload both archives from before and after tuning to the Sharepoint Configs Page. Machines are sorted by type and serial number.

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